| GRN Environmental (Hong Kong) Limited | Private company limited by shares | Live |
| HONG KONG MEI DI ENVIRONMENTAL LIMITED | | Live |
| BIOTEK ENVIRONMENTAL SCIENCE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| LATINS ENVIRONMENTAL ART DESIGN (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Shui Fa Environmental Health (Hong Kong) Limited | Private company limited by shares | Live |
| NORTH MORNING ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SHUI HONG WAH (HONG KONG) ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| WANG BROTHERS ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| Lesso Environmental Technology (Hong Kong) Limited | Private company limited by shares | Live |
| ENVIRONMENTAL LIGHTING (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| HONG KONG LUYOU ENVIRONMENTAL TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| Environmental Management Association of Hong Kong Limited -The- | Company limited by guarantee | Live |
| CAREMORE ENVIRONMENTAL MANAGEMENT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG ENVIRONMENTAL MANAGEMENT LIMITED | Private company limited by shares | Live |
| ENVIRONMENTAL MANAGEMENT TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| NATURAL POWER ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| OWEN (HONG KONG) ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Dissolved |
| PAUL'S (HONG KONG) ENVIRONMENTAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Environmental People Association Limited | Private company limited by shares | Live |
| Hong Kong Plastic Environmental Plastic Limited | Private company limited by shares | Live |
| HONG KONG FU CHEONG ENVIRONMENTAL PRODUCTS LIMITED | Private company limited by shares | Live |
| J. P. ENVIRONMENTAL PRODUCTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| ECI ENVIRONMENTAL PRODUCTS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Aireason Environmental Protection Limited | Private company limited by shares | Live |
| HONG KONG CHOICER ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| HONG KONG FEDERATION OF ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| GLORY ENVIRONMENTAL PROTECTION (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG GUOXIN ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| NEW HONG KONG ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Dissolved |
| C&G Environmental Protection (Hong Kong) Company Limited | Private company limited by shares | Live |
| Hong Kong Hou Tat Environmental Protection Limited | Private company limited by shares | Live |
| Hong Kong Organic Environmental Protection Limited | Private company limited by shares | Live |
| RIGHT-SUN ENVIRONMENTAL PROTECTION (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG QSI TECHNOLOGY ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| HONG KONG AIR ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HONG KONG AN DA ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Man Tung Environmental Protection (Hong Kong) Limited | Private company limited by shares | Live |
| HONG KONG ZHAO DA ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| HONG GUANG ENVIRONMENTAL RECYCLING LIMITED | Private company limited by shares | Live |
| Hong Kong Environmental and Recycling Limited | Private company limited by shares | Live |
| HONG KONG LIANCHUANG ENVIRONMENTAL RECYCLING LIMITED | Private company limited by shares | Live |
| HONG KONG ENVIRONMENTAL (GREEN) RESEARCH LIMITED | Private company limited by shares | Live |
| NEW POWER ENVIRONMENTAL RESOURCES (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SADDIQ ENVIRONMENTAL SOLUTIONS (HONG KONG) LIMITED | Private company limited by shares | Live |
| SAMUEL ENVIRONMENTAL RESOURCES (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG ENVIRONMENTAL SCIENTECH LIMITED | Private company limited by shares | Dissolved |
| HONG KONG WEI MEI LI AN ENVIRONMENTAL SERVICE LIMITED | Private company limited by shares | Live |
| Hong Kong Environmental Social Governance Limited | | Live |
| HONG KONG STANDARD ENVIRONMENTAL INVESTMENT CO. LIMITED | Private company limited by shares | Dissolved |
| HONG KONG STANDARD ENVIRONMENTAL COMPANY LIMITED | Private company limited by shares | Live |
| DOW'S ENVIRONMENTAL TECH. (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG AOLIYUAN ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| HONG KONG ASIA ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HONG KONG EOK ENVIRONMENTAL TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| HONG KONG JUN YU ENVIRONMENTAL TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Dong Yue (Hong Kong) Environmental Technology Limited | Private company limited by shares | Live |
| Hong Kong Ba Fang Environmental Technology Limited | | Live |
| LAI HONG ENVIRONMENTAL TECHNOLOGY (HK) LIMITED | Private company limited by shares | Dissolved |
| HONG BAO ENVIRONMENTAL TECHNOLOGY (HK) CO. LIMITED | Private company limited by shares | Live |
| Kale Environmental Technology (Hong Kong) Limited | Private company limited by shares | Live |
| Hong Kong Environmental Technology Limited | Private company limited by shares | Live Commenced dormancy on 16-Jul-2012 |
| SPP ENVIRONMENTAL TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| CDT ENVIRONMENTAL TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| Ash environmental technology (Hong Kong) Limited | Private company limited by shares | Live |
| Hong Kong Mutual Environmental Technology Company Limited | Private company limited by shares | Live |
| Hong Kong Selvant Environmental Technology Company Limited | | Live |
| Hong Kong ShengRong Environmental Technology Limited | Private company limited by shares | Live |
| SONNE TECHNOLOGY ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Kin Wing Environmental Technology Limited | Private company limited by shares | Live |
| Xutong Environmental Technology Hong Kong LIMITED | Private company limited by shares | Live |
| Hong Kong Environmental & Testing Centre Limited | Private company limited by shares | Dissolved |
| TAI HING HONG ENVIRONMENTAL TRADING LIMITED | Private company limited by shares | Live |
| E. S. WOOD GREEN AIR ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG YISA ENVIRONMENTAL ENGINEERING LIMITED | Private company limited by shares | Live |
| DEHUNG ENVIRONMENTAL TECHNOLOGY (HONGKONG) LIMITED | Private company limited by shares | Live |
| Wisdom Environmental Technology (HongKong) Limited | Private company limited by shares | Live |
| Hongye Environmental Protection Technology Co., Limited | | Live |
| HONKIE ENVIRONMENTAL LIMITED | Private company limited by shares | Dissolved |
| HUAFUDA ENVIRONMENTAL (H.K.) LIMITED | Private company limited by shares | Dissolved |
| HUANUO ENVIRONMENTAL HEALTH CO., LIMITED | Private company limited by shares | Live |
| HUDSON ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Huidu Environmental Technology (Hongkong) Co., Limited | Private company limited by shares | Live |
| HK HUI-MIN ENVIRONMENTAL TECH CORP. LIMITED | Private company limited by shares | Live |
| Huiying Metal Environmental Recycling Co., Limited | | Live |
| Hundred Gain Environmental Protection Limited | Private company limited by shares | Live |
| HYDER ENVIRONMENTAL LIMITED | Private company limited by shares | Dissolved |
| C&S ENVIRONMENTAL HYGIENE LIMITED | Private company limited by shares | Live |
| CHECKERS ENVIRONMENTAL HYGIENE LIMITED | Private company limited by shares | Dissolved |
| Cheuk Yi Environmental Hygiene Limited | | Live |
| CHUNG WO (ENVIRONMENTAL HYGIENE) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Advantage & Effective Environmental Hygiene Consultant Limited | Private company limited by shares | Dissolved |
| GLOBAL HYGIENE AND ENVIRONMENTAL LIMITED | Private company limited by shares | Live |
| LabPro Environmental Hygiene (HK) Limited | Private company limited by shares | Dissolved |
| OK Environmental Protection Hygiene Management Company Limited | | Live |
| SUNBASE ENVIRONMENTAL HYGIENE LIMITED | Private company limited by shares | Live |
| DE SARUS ENVIRONMENTAL HYGIENE SYSTEM LIMITED | Private company limited by shares | Live |
| HYPER-TECH ENVIRONMENTAL LIMITED | Private company limited by shares | Live |
| Ideal Environmental Technology Company Limited | Private company limited by shares | Live |
| INDOOR ENVIRONMENTAL PURIFCATION LIMITED | Private company limited by shares | Live |
| INDOOR ENVIRONMENTAL SOLUTIONS LIMITED | Private company limited by shares | Live |